I just put a mechanical wide sweep oil pressure gauge on my 03 Tundra V8 to monitor the true reading at idle. I goes from 75 lbs at highway to 15 lbs at idle. I have a loud tap, that started two months ago when starting it up cold, for just a minute when tempature is less than 47 degrees.The tapping sound is like two rocker arms both having a 1/4" gap clearence.
My is still under warrenty and Toyota is giving me a run around.
My 1st complaint was the factory gauge with lines is reading lower than normal at idle [1st line from bottom on gauge],Answer-See no leaks and gauge responding correctly.
My 2nd complaint was truck tapped when starting cold. Answer= See tapping CAN BE normal till fully warm due to Hyper Tention Pistons
I bought truck new and the tap has only been the last two months.
The dealer does hear a small tap all the time, only when its in drive.
They has the truck again one day this week,but could not check oil pressure, because their only gauge in shop was broken.That is why I put my own gauge on.
What should be the lowest normal oil pressure reading at idle?
Thanks in advance Al